A misconception prevails that the suffix Nath with
the names of many Tirthankars is the influence of the
Nath sect of Yogis. It is baseless as the founder of
the Nath sect, Matsyendranth belonged to the 800 A.D. The suffix
Nath is found in much earlier Jain works like Bhagavati Sutra and
Avashyak Sutra. Yati Vrishabhacharya in his Tiloyana Pannats has
also used this suffix (400 A..D). As such it appears that it was
Matsyendra who was influenced by the popularity of Neminath and
Parshvanath and started using the suffix Nath.